:root {
  --bg: #f4f6f9; --card: #fff; --text: #16202b; --muted: #5d6b7a; --line: #d8dee6;
  --accent: #1f4e79; --error: #b91c1c;
  --ok-bg: #d8f0dc; --ok: #14532d; --bad-bg: #fbd5d5; --bad: #7f1d1d; --warn-bg: #fdecc8; --warn: #7a4b00;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11161c; --card: #1a2129; --text: #e5eaf0; --muted: #9aa7b4; --line: #2c3540; --accent: #7fb3e6;
          --ok-bg: #1d3b26; --ok: #a7e3b5; --bad-bg: #4a1f1f; --bad: #f5b5b5; --warn-bg: #4a3712; --warn: #f3d08a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; }
header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px;
         padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; color: var(--accent); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
nav form { margin: 0; }
a { color: var(--accent); }
main { max-width: 1200px; margin: 0 auto; padding: 20px 16px 40px; }
h1 { font-size: 1.4rem; margin: 0 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 24px; }
.narrow { max-width: 420px; margin: 40px auto; }
label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; color: var(--muted); margin-bottom: 12px; }
input, select, textarea { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); color: var(--text); }
button, .button { font: inherit; padding: 8px 16px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; display: inline-block; }
.button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.link { background: none; color: var(--accent); padding: 0; text-decoration: underline; }
.filter { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px; margin-bottom: 16px; }
.filter label { margin: 0; }
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); display: block; overflow-x: auto; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: .85rem; color: var(--muted); white-space: nowrap; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .85rem; font-weight: 600; white-space: nowrap; }
.ohne_maengel, .behoben { background: var(--ok-bg); color: var(--ok); }
.mit_maengeln, .offen { background: var(--bad-bg); color: var(--bad); }
.offene_vorpruefung, .teilweise { background: var(--warn-bg); color: var(--warn); }
.muted { color: var(--muted); }
.error { color: var(--error); font-weight: 600; }
.ok { color: var(--ok); background: var(--ok-bg); padding: 8px 12px; border-radius: 6px; font-weight: 600; }
.add { margin: 24px 0 16px; max-width: 720px; }
.add h2 { font-size: 1.1rem; margin: 0 0 12px; }
.row { display: flex; flex-wrap: wrap; gap: 12px; }
.row label { flex: 1 1 240px; }
fieldset { border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; margin: 0 0 12px; }
legend { font-size: .9rem; color: var(--muted); padding: 0 4px; }
label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); margin: 4px 0; }
.actions { white-space: nowrap; }
.actions form { display: inline; margin: 0 6px 0 0; }
button.danger { color: var(--error); }
tr.inaktiv td { opacity: .55; }
.qr svg { display: block; margin: 12px auto; max-width: 100%; height: auto; }
code { word-break: break-all; }